645855 ÷ 24 
We want to divide 645855 by 24.

Let's proceed to step 1:
The number 24 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 24

Moving on to step 2:
24 can be fit into 64 2 times, resulting in a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 48 from 64 leaves us with 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 24

Going ahead to step 3:
24 goes into 165 6 times with a remainder of 21.
The next digit of our result is 6. 
Result so far: 26.0
Deduct 144 from 165 and we're left with 21.
Take the next digit (8) from the dividend and append it to 21, then repeat: 218 / 24

Moving on to step 4:
24 goes into 218 9 times with a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 269.0
If we take 216 away from 218, we end up with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 24

Advancing to step 5:
The number 24 fits into 25 1 times, leaving a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 2691.0
Subtracting 24 from 25 leaves us with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 24

Let's proceed to step 6:
24 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 26910.0
If we take 0 away from 15, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 7:
When dividing 150 by 24, we get 6 with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 26910.6
Deduct 144 from 150 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
60 divided by 24 is 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 26910.62
If we subtract 48 from 60, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 9:
When dividing 120 by 24, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 26910.625
Subtracting 120 from 120 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
24 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 26910.625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
24 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 26910.625
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 26910.625, and the remainder is 0.0.